667602613 has 4 divisors (see below), whose sum is σ = 670957600. Its totient is φ = 664247628.

The previous prime is 667602599. The next prime is 667602629. The reversal of 667602613 is 316206766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667602613 - 2²¹ = 665505461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667602643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677195 + ... + 1677592.

It is an arithmetic number, because the mean of its divisors is an integer number (167739400).

Almost surely, 2^667602613 is an apocalyptic number.

It is an amenable number.

667602613 is a deficient number, since it is larger than the sum of its proper divisors (3354987).

667602613 is a wasteful number, since it uses less digits than its factorization.

667602613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354986.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 667602613 is about 25838.0071406446. The cubic root of 667602613 is about 873.9890857886.

The spelling of 667602613 in words is "six hundred sixty-seven million, six hundred two thousand, six hundred thirteen".